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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 303 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  3. 3.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  4. 4.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 430 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  12. 12.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  18. 18.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  24. 24.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 170 N did 1360 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 350 N did 2450 J of work. How many metres did the object move?
  37. 37.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 320
  2. joule (J)
  3. less effort
  4. 1
  5. 3440
  6. 250
  7. 350
  8. 3
  9. 5
  10. 2
  11. through a distance
  12. 1
  13. 480
  14. 770
  15. 6
  16. 8
  17. 60
  18. 80
  19. 8
  20. 1000
  21. 60
  22. 2
  23. no, work stays the same
  24. 1680
  25. 1290
  26. 200
  27. 320
  28. 400
  29. 7
  30. 6
  31. 3
  32. 360
  33. 180
  34. 440
  35. 8
  36. 7
  37. 560
  38. 8
  39. 760
  40. 320

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